Non-buoyant pollutant sources and particles in displacement ventilation

Mundt, Elisabeth

doi:10.1016/s0360-1323(01)00008-7

Cited by 45 publications

(25 citation statements)

References 1 publication

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“…The contaminant removal effectiveness (the system's ability to remove contaminants from the space. ), in displacement ventilation, was found to be related to the ventilation flow rate, and very sensitive to the level of the source and its position (Mundt, 2001). However Hagstrom et al (2000) found that it was a function of both the location and the power of the sources in relation to the supply and exhaust openings.…”

Section: Introductionmentioning

confidence: 99%

An Analytical Solution for Steady Temperature Profiles in a Vertically Stratified Environment

Awad¹

2014

MAS

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Thermal stratification is an important phenomenon to be evaluated and studied to save energy consumed in fully insulated environments and to improve indoor air quality and human comfort. An analytical study to investigate stratified flow characteristics in a ventilated environment was presented. Most existing studies were either numerical or experimental and correlations for predicting characteristics of stratified flow, such as temperature distribution, temperature gradient, stratified layer thickness and height were based on empirical data. A simple mathematical model was developed to predict these characteristics. The predictions were compared with the published experimental data and good agreement has been obtained. Such a simple model would be very useful to practicing engineers for HVAC and designing applications.

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Section: Introductionmentioning

confidence: 99%

An Analytical Solution for Steady Temperature Profiles in a Vertically Stratified Environment

Awad¹

2014

MAS

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“…The indoor particle deposition rate is influenced by the properties of the deposition environment such as size and shape of the room, roughness of surfaces, airflow rates, inlet/outlet locations, surface-to-air temperature difference, furniture in the room, etc. (Nazaroff et al, 1993;Abadie et al, 2001;Jamriska et al, 2000;Mundt, 2001;Nomura et al, 1997;Fogh et al, 1997;Zhao et al, 2004;Thatcher et al, 2002). But most of all it depends on the particle mass which directly depends on particle size.…”

Section: Intervention and Controlmentioning

confidence: 99%

Monitoring and control of particulate matter in indoor air: A review

Gupta¹,

Bhandari²

2011

JANS

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Abstract:The review discusses the sources and concentrations of particulate matter in different microenvironments, their effect on human health, monitoring and their possible control measures particularly in office and residential buildings. Effect of various ventilation strategies on particulate concentration in air has been discussed. The calculations suggest that if the outdoor particle concentration is not more than 5-10 times the indoor particle generation rate, ventilation could be a very effective tool to control the indoor particle concentration. For coarse particles the choice of ventilation strategy is not very crucial, but for fine particulate slow rate of ventilation is more effective.

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“…Zhang and Chen studied particle transportation and distribution in ventilation chamber that found that different forms of ventilation had a great impact on indoor particle concentration distribution [10]. Munat investigated and analyzed influence that different airflow forms to particle resuspension, the results showed that displacement ventilation system had small resuspension harm [11].…”

Section: Introductionmentioning

confidence: 99%

The transmission characteristics of indoor particles under different ventilation conditions

Wang

Wei

2017

E3S Web Conf.

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Abstract:In modern society, ventilation is an important method for removing indoor particles. This study applies the parameter of attenuation index to analyze the effect of the removal of indoor particles in the two typical ventilation strategies called ceiling exhaust and slit exhaust strategy. Experiment was conducted in a chamber and riboflavin particles were used as the indoor particles source, instantaneous microbial detection (IMD) used to measure the particulate concentration. Conclusions can be found that air exchange rate is an important factor affecting the indoor particle concentration distribution. In the process of indoor free settling(air exchange rate is 0 h -1 ), the deposition rate were 0.086 h -1 , 0.122 h -1 , 0.173 h -1 for the particles of 0.5-1.0 μm, 1.0-3.0μm and 3.0-5.0 μm. When the air exchange rate increased to 2.5 h -1 , the differences in the attenuation index is significant. There was also a significant linear relationship between air exchange rate and attenuation index. Furthermore, the effect of the slit exhaust strategy on the removal of coarse particles is more remarkable as the increasing air exchange rate.

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Non-buoyant pollutant sources and particles in displacement ventilation

Cited by 45 publications

References 1 publication

An Analytical Solution for Steady Temperature Profiles in a Vertically Stratified Environment

An Analytical Solution for Steady Temperature Profiles in a Vertically Stratified Environment

Monitoring and control of particulate matter in indoor air: A review

The transmission characteristics of indoor particles under different ventilation conditions

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